Crane trolley



Nav. 11, 1930.

A. E. HOGREBE CRANE TROLLEY Filed July 6, 1928 6 Sheets-Sheet lINVENTOR.- ArZhzzI'EHog/reb@ ,Ak LMHEINI www?,

A TTORNE Y Nov. 11, 1930. A. E. HoGRr-:BE

CRANE TROLLEY Filed July e, 192s 6 Sheets-sheet 2 INVENTOR: Aihurff.frebe,

A TTORNEY.

N0v.11`, 1930. AEHOGREBE. V y 1,781,281

CRANE TROLLEY Filed July 6. 1928 6 SheetsvSheet 3 n INVENTOR.

jlrmr Egrebe,

WITNESSES:

ATTORNEY.

Nov. 11, 1930. A. E. HQGREBE CRANE TROLLEY Filed July 6, 1928 6Sheets-'Sheet 4 WITNESSBS:

A TTORNE Y.

Nov. l1, 1930.

A. E. HOGREBE CRANE TROLLEY Filed July 6, 1928 6 Sheets-Sheet 5 ELLE- 7-INI/ENTOR: Ariba? WITNESSES:

Hgrebe,"

ATTORNEY.

Nokl 11, 1930. A. E, HOGREBE '1,781,281

CRANE TROLLEY Filed July 6, 192V;` 6 Shee'tS-Shee 6 WITNESSES:

I N V EN TOR: Arhur E Ij'ngrbe) BY W Mmm?. M

i ALin fno Patented Nov. 11, 1930 l UNITED STATES PATENT oFFlcE y ARTHURn. noennnn or PHILADELPHIA, PENNSYLVANIA, AssirGNon To Box CRANE & HOISTCORPORATION, OF PHILADELPHIA, PENNSYLVANIA, A` CORPORATION F i DELAWARECRANE TROLLEY This invention relates to traveling cranes i and hasparticular reference to the trolleys which travel thereon for liftingand moving weighty articles',

Y i15 One of the objects ofthe inventionlis to provide an improvedcranetrolley.

`Another object of the invention is to provide a crane trolley whoseparts are so arranged that it will have a greatertraverse movement.`"Another object ofthe invention is to pro- 1 Videla trolley soconstructed that it may be "mounted closer tothe roof of a buildinginVorder `to permit loads to be lifted to greater heights; i i

*Still another object of the invention is yto provide a crane trolleywhosemotors are so positioned asfto permit the bridge to be 'moved tothe outermost limit of its supporting rails. i i

According to the invention, the crane trolleyis arranged with sideframes andconnectingmeans between thesame, the side frames havingintegral extensions onmounting a hoist motor parallel with one of theframes and a traversemotor parallel with the other frame, saidextensions being so arranged that the"motors arebelow the tops of said`frames. V

tegral bea-rings for supporting the traction wheelshafts and withintegral bearings for supporting the hoist drum .shait. The mechanismfor operating the traction wheels and the hoist drum may also be mountedand connected with the` respective motors in integral housings formed onsaid side frames.

The drawings illustrate an embodiment of the invention and` the viewstherein areas follows: i VFigure l is a top plan view, partly brokenaway, of a traveling crane having a trolley `constructed according to`my invention,V

` Figure 2 an end .view7 thereof, Y, i -Figure a top plan view of thetrolley with certain parts broken away,

drive side of the trolley, the gear ons@ Cover 59- .bcng'lbroken open, fl t i The side 'frames may be provided with indesignated as 26 beingidle' wheels.

Figure 5 is a cross-section taken on the line `5-#5 Vof Figure2 butshowing the block in raised position, i

Figure (iis an enlarged elevation of the hoist drive side ofV thetrolley, the gearcase cover being omitted,

Figure 7 an enlarged fragmentary crosssection taken on the line 7 7 ofFigure 1 but showing the block in raised position and the casing of thelimit switch broken open, and

F lgure 8 a wiring diagram showing the connectionsV between the severalmotors, brake release solenoid and limit switch.

Figure l illustrates the manner in which the bridge is mounted onthebridge tracks 1l through the wheels 12 which are located near thecorners of the bridge and, as shown, are mounted between the tie beams'14. The outer ends of the tie beams arefastened together between thetwotracks 11 by a side beam 16 at each end thereof. i

The bridge tracks are ordinarily mounted onsuitable girders orIj beams13 which are ed trolley tracks 18.

The bridge `here shown is in fskeleton form, the driving motor for thesame and other mechanism having been omitted as the invention hereinrefers particularly to the trolley and only such parts of the otherapparatus as are necessary for the explanation of the invention havebeen shown.

The trolley, whichis generally designated as 19,` provided with sideframes 2l and 22 which are connected by means of the intermediatechannel member 23. The trolley is also `provided with traction wheels,two of the same .characterized by the numeral 24 being the drivenwheels, and the other two Each pair of wheels is mountedon an axle 27and t i -28,yrespectively. Figure t is an elevation of the traction y"The trolley fis alsoprovided with a hoist drum 29 which has a shaft 31extending throughthesameanclths drum is located Abetween the axles 27and 28 andpnearer to vthe latter. Y c Y rThe drum 29 is provided with acable 32, the ends of which kare fastenedy by means of clamps 33tofsaiddrum and said cable passes downward under sheave wheels 34 rotatablymounted in the block 36 to which the hook 37 is attached, and'then'ceupward and over an equalizing pulley 38 which is mounted between the'bracket-"39 and a plate 41 Whchis securedto the channel-23.V

j The idle'wlieels 26 of the trolley are secured to the axle 28 andtheends of the axle pass into bearing housings ywhich are inte-V grallyformed i in the side frames 21 and 22 and which are provided with ballbearings 42.

Thetraction wheels 24 are also securelyu mounted on the axle 27 and one'end of the same passes into arbearing housing in the side franiep21which-ispro-Vided'with a suit-able ball bearing 43,7while the other endvof said axle extends -througha bearing housing 44, in ,the` side'frame22, provided with two ball bearings 46 and intoa gear housing 47.`Vllhis end Aof. the axle is provided with a worm wheel 48.

Referring now side frame 22 is also provided with anexl i Y Theshaft'52of this mot-or is provided onV 'its one end with apinion v53which meshes tension 49to which, a traverse motor 51. is

fastened.v 1

- Vwith a pinion 54 fastened to the end of a shaft Y 56 which islocated;l in the housing -47 and which rotates in the Yball bearing 57and ini-a similar ball [bearing 'located within the cover 58: n

y The shaft 56 isprovided with aaworm 59 which meshes with the wormwheel 48 on the end of the axle 27 so that the traction wheels 24" arerotated through the medium of the motor shaft 52, the pinion 53 meshingwith thepinion 54 ony the shaft'56, and the worm 59 meshing withthe'worm wheel 48. v

Y The gear housing 47 is provided with a 'cover 61 whichcompletelyencloses said gear Y .mechanismvand thevone end ofthe traversev motor51. 1

One-,end of the shaft 31Vofthe hoist drum 29 extends into abearinghousing 62: in the:`

side frame 22 where it is provided with ball bearings 63 andthe otherend of said shaft extends into a loearingfhousmg 64 formed integral withthe side frame 2 1 `and saidfhousing isprovided with Va' pair ofball'bearings 6.6u while the outer'endY of said shaft extends yinto theO'ear housing v67Y and' isE provided, on its outer end, with. a wormwheel 68.

YH'Referring now'to Figures 1, 3 and 6the side frame21' is provided withan ii'itegralY extension69 to which aino'tor 71 is connected by theflange 72. The 'end of th'e'inotor shaft 73, whichV extends-into thegear housing 67,

FiguresY 2, 3 and4, the f 77. This shaft Vis suitably mounted inthe ballbearings v7 8 and is provided with a worm 79 which meshes with wormwheel 68 `on the end of the shaft131 of the hoistdrum 29.

rlhe gear housing is provided with a-cover 80 for enclosing theinechanisinand the open end of inotorf7'1.

The outer end of the shaft 73'of the motor i y 71 is provided with afriction` drum 81 while `the side frame 2.1 4has`abraclietj82 securedthereto, said bracket having brakebands 83 vand '84 pivotally connectedthereto at' the points 86, the'bottom ends ofsaid bands beL ingconnected to a spreading mechanism-87, the outer end of which connectsto a yvertical plunger 88 which ext-ends upward into a. sole- `noid 89,saidv solenoid being. fastened to a Y Y. A

plate91 connected to the,bracket82.,V

In orderto limit the height at which the Y block may he raised'so thatthe same will notV vstrike the equalizing pulley 38, a limit switch 92is mounted on a bracket 93'whicli in turn is mounted on the plate411fconnected to the channel 23.l i .c e. ,f

This limit switch consists of aY casing` 94 containing fixedcontacts96and 97.-,y A con-v tact-lever 98, hinged at 99Y in the casingand on the side frame 21. This armvl04is adapt-`V ed to be engagedby'the.block 36 when the Y same reaches its uppermost position andas the saidarm is raised, the compression spring 103 will swingthe lever 98Hupwardon its vpivotedpoint 99 so that the contact- 101will be drawn upwardlyfromthe contactsv'96. and 97, therefore breaking the electric circuit. 1l

During the normal operationof the hoist, the plunger 88 of the solenoidis in its raised position owing tov theenergization of .said

solenoidbut whenftheblock 36 vreachesfits upperinos'tfpositionandoperates the limit switch ,92, said plungervwill fall and permit.V

the brake bands 83 and 84 tofri'ctionally engage the brake druin'-Y tostop the motor71,

Vas laterfexplained in connection with-Figwiring diagram showing the vll2i1 Figure 8 isa method in which the severalinotorsofl theV crane, thelimit switch, the brakev Vrelease solenoid, and ,thej automatic vswitchare cony zne'cted. isprovided `with a pinion 74 which meshes with'zapinion 76 onfthe innerendofla, shaft" i In this Wiring diagram, motorwhich has been excluded fromxtlen showing i no in the other views isdesignated by the numeral 108. The bridge motor 108, the traverse motor51 and the hoist drum motor 71 are each of the A. C. three phase type.109, 111 and 112 designate the controllers for the motors 108, 51 and71, respectively.

113 represents a main switch from a source of three phase alternatingcurrent and is connected to the three wires 11-1, 115 and 110. Thesewires extend to a three pole-single throw switch 117 in the bridge motorcircuit so that when said switch is closed, this'motor may be operatedthrough the controller 109.

The wires 114, 115 and 116 are also connected with a three pole-singlethrow switch 11,8 which, when closed, permits the traverse motor 51 tobe operated. through the control- Y ler 111.

y when the same is closed, the relay will be energized so that the threephases of the lines i 114, 115 and 116, which are controlled thereby,will be closed and the hoist drum motor 71 then may be operated throughthe control 112.

However, if the limit switch 92 has been opened by the raising of thebloc-lr to its highermost position, as before explained, then the relaywill be cle-energized and the wires constituting the three phases to thehoist motor will be opened.

In orderto operate the hoist motor, it will then be necessary to closethe shunt switch 121 which will energize the relay coil 120 so as toclose the contacts of the three phases leading to the motor 71.

An auxiliary switch 122 is provided for opening the hoist motor circuitquickly, if desired, by cle-energizing the relay coil 120.

The solenoid 89 is energized through wires which extend across a singlephase of the lield winding of the motor 71 and upon the opening of thelimit switch 92 and the deenergizing of the relay 120, the automaticswitch will be opened and the solenoid cle-energized so as to permit thebrake bands 83 and 84; to frictionally grip thebrake drum 81 `andthereby stop the motor 71.

During the ordinary operation of the niotor 71, and when the limitswitch 92 is closed, the switch 121 will be opened as the connection ismade through the switch 122.

By reason of the location of the hoisting and traverse mechanisms, thehook 37 may be raised to the highest possible position, as there are nooverhead obstructions on the trolley. Figures 3 and 5 illustrate thisprinciple. i

For the same reason the trolley is` made much more compact and narrowerwhich permits of a greater hook approach toward the side walls of thebuilding.

Both of these features permit a greater utilization of space in abuilding, and therefore its employment virtually adds to the availablecubical capacity of the building.

With the arrangement of the trolley side The location of the motorsabove the side r beams 1G also permit the motors to extend beyond thelimit of travel of the bridge so that the hoist may be used in portionsof the building and against the walls thereof, hitherto inaccessible tothe same.

The crane trolley herein illustrated may be modified in various wayswithout departing from the invention herein set forth and hereafterclaimed.

The invention is hereby claimed as follows: i

l. A crane trolley having side frames, means on one of said frames forsupporting a traverse motor longitudinally parallel thereto and belowthe top of said frames, bearing housings on said frames for supporting ahoist drum shaft, means for supporting a hoist motor on the other frameand longitudinally parallel to said frames, and a housing on said lastframe for housing gear means and mechanism for connecting said means tosaid hoist motor, the mechanism between the means and motor being soarranged that the motor may be mounted below the top of the side frames.

2. A crane trolley having side frames, means on one of said frames forsupporting a traverse motor longitudinally parallel thereto and belowthe top of said frames, bearing housings on said frames for supporting ahoist drum shaft, means for supporting a hoist motor on the other frameand longitudinally parallel to said frames, and a housing n said lastframe for housing a worm wheel and mechanism for connecting said wheelto said motor, the mechanism between the worm wheel and motor being soarranged that the motor may be mounted below the top of the side frame.

In testimony whereof I have signed my name to this specification.

ARTHUR E. HOGREBE. j

